The Properties of Linear Low Density Polyethylene/Cyperus Odoratus (LLDPE/CY) Blends: Effect of Sodium Hydroxide

2015 ◽  
Vol 815 ◽  
pp. 69-73 ◽  
Author(s):  
Nik Ahmad Faris Nik Abdullah ◽  
Nik Noriman Zulkepli ◽  
Sam Sung Ting ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
Kamarudin Hussin ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Sodium Hydroxide ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Natural Fibers ◽  
Biodegradable Plastics ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Linear Low Density Polyethylene ◽  
Naoh Solution

The purpose of this study was to determine the effect of treated Cyperus Odoratus (CY) with sodium hydroxide (NaOH) on the properties of biodegradable plastics made from linear low density polyethylene (LLDPE)/CY blends. Alkali treatments for natural fibers can increased adhesion between the hydrophilic fibers and hydrophobic matric. After CY was treated with 5% NaOH solution, it can be seen that the tensile strength and Young’s modulus of the LLDPE/CY blends significantly increased. Therefore, alkali treatments can be considered in modifying the properties of natural fibers.

Investigation of Epoxidized Natural Rubber (ENR 50) as a Compatibilizer on Cogon Grass Filled Low Density Polyethylene/Soya Spent Flour

2014 ◽  
Vol 803 ◽  
pp. 310-316 ◽  
Author(s):  
S.T. Sam ◽  
Nurul Hani ◽  
H. Ismail ◽  
Nik Noriman ◽  
S. Ragunathan
Keyword(s):  
Tensile Strength ◽  
Fourier Transform ◽  
Natural Rubber ◽  
Water Absorption ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Fourier Transform Infrared ◽  
Epoxidized Natural Rubber ◽  
Low Density Polyethylene ◽  
Low Density

Natural fiber reinforced composites are increasingly being used in various applications area. Therefore, the processing method and physical properties of these composites are very important parameters in product quality and quaranty. This paper focused on the tensile properties, Fourier transform infrared (FTIR) and water absorption of cogon grass (CG) with low density polyethylene (LDPE)/soya spent flour (SSF) composites. The tensile strength and elongation at break (Eb) of uncompatibilized CG with LDPE/ SSF decreased significantly with increasing of fiber content. However, the Young’s modulus increased with increasing of CG loading. The presence of epoxidized natural rubber (ENR 50) as a compatibilizer increased the tensile strength, Eband Young’s modulus of the composites when compared to uncompatibilized composites. Fourier transform infrared results show distinguishable peaks for compatibilized and uncompatibilized composites. The water absorption for both uncompatibilized and compatibilized composites increased from day 1 until day 21. The presence of ENR 50 as compatibilizer showed lower water absorption percentage compared to uncompatibilized composites.

Mechanical and Morphological Properties of Polylactic Acid/Recycled Low Density Polyethylene/Nypa fruticans Biocomposites Compatibilized with Polyetylene-co-Acrylic Acid

2015 ◽  
Vol 754-755 ◽  
pp. 54-58 ◽  
Author(s):  
M. Syahmie Rasidi ◽  
H. Salmah ◽  
Pei Leng Teh ◽  
Hanafi Ismail
Keyword(s):  
Tensile Strength ◽  
Acrylic Acid ◽  
Young’S Modulus ◽  
Polylactic Acid ◽  
Young's Modulus ◽  
Morphological Properties ◽  
Low Density Polyethylene ◽  
Tensile Fracture ◽  
Low Density ◽  
Recycled Low Density Polyethylene

The main purpose of incorporating Nypa Fruticans (NF) into Polylactic Acid (PLA)/Recycled Low Density Polyethylene (rLDPE) biocomposites is to decrease costs and change the properties. Polyethylene–co–acrylic acid (PEAA) was used as a compatibilizer. The effect of NF content and PEAA on the mechanical properties and morphology of the biocomposites were investigated. Results show that the effect of NF content increased Young’s modulus but decreased the tensile strength and elngation at break of PLA/rLDPE/NF biocomposites. It was found that incorporation of compatibilizer (PEAA) increased the tensile strength and Young’s modulus but decreased the elongation at break of compatibilized biocomposites. Scanning electron microscopy (SEM) study of the tensile fracture surface of the biocomposites indicated that the presence of PEAA improved the interfacial interaction between Nypa Fruticans and LDPE matrix.

Mechanical and thermal characterisations of low-density polyethylene/nanoclay composites

2020 ◽  
pp. 096739112096844
Author(s):  
Sameer A Awad
Keyword(s):  
Thermal Stability ◽  
Tensile Strength ◽  
Young’S Modulus ◽  
Thermal Gravimetric Analysis ◽  
Young's Modulus ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Gravimetric Analysis ◽  
Thermal Gravimetric ◽  
Melt Mixing

The improvements of the thermal, mechanical, morphological properties of low-density polyethylene (LDPE)/nanoclay (NC) composites were investigated. Low-density polyethylene (LDPE) with different NC contents 2 wt.% ( V f = 8%), 4 wt.% ( V f = 15), and 8 wt.% ( V f = 27) with a fixed particle size (300μm) were prepared by the melt mixing process. The thermal tests (thermal gravimetric analysis) were performed to monitor the thermal stability of LDPE composites. The mechanical tests such as tensile strength, Young’s modulus, and strain at break were studied. The results of the thermal gravimetric analysis (TGA) display significant enhancement in thermal stability as the loading of NC increased in pure LDPE. The results showed that the NC fillers could effectively improve the mechanical properties of LDPE by comparison to pure LDPE, the tensile strength of LDPE/8 wt.% of NC are increasing by about 17% while Young’s modulus is increased by about 39%. From DMA results, the storage modulus is enhanced with increasing of NC loading into the LDPE matrix. The results of SEM photographs indicate that the incorporation 8 wt.% of NC displayed the best particles dispersion in the LDPE matrix.

Effect of the blow-up ratio on morphology and engineering properties of three-layered linear low-density polyethylene blown films

2017 ◽  
Vol 34 (1) ◽  
pp. 27-42 ◽  
Author(s):  
Suthakarn Auksornkul ◽  
Siriwat Soontaranon ◽  
Chonthicha Kaewhan ◽  
Pattarapan Prasassarakich
Keyword(s):  
Electron Microscopy ◽  
Tensile Strength ◽  
Transverse Direction ◽  
Blow Up ◽  
Engineering Properties ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Film Morphology ◽  
Linear Low Density Polyethylene ◽  
Machine Direction

A series of linear low-density polyethylene films were produced using a three-layer co-extrusion machine. How the blow-up ratio and resin characteristics affected the final film morphology and engineering properties were studied. The crystalline morphology and orientation during the blown film process of the low-density polyethylene film were investigated using small-angle X-ray scattering, transmission electron microscopy and scanning electron microscopy. Increasing the blow-up ratio increased the transverse direction molecular orientation and decreased the machine direction orientation. The resulting low-density polyethylene morphology was a regular lamellar stacking parallel to the machine direction. The film morphology strongly influenced the mechanical properties. Increasing the blow-up ratio from 1.7 to 2.8 decreased the machine direction tensile strength by 14% and increased the transverse direction tensile strength up to 27% for both the low-density polyethylene/1-butene and low-density polyethylene/1-octene co-monomers, while the machine direction tear strength increased up to 36% and the transverse direction decreased by 16%. Moreover, the first and second heating characteristics from differential scanning calorimeter showed the inherent crystallinity change with increasing blow-up ratio for both the low-density polyethylene/1-octene and the low-density polyethylene/1-butene copolymer. The crystalline orientation changes induced with increasing blow-up ratio affected the film water vapor and oxygen permeability.

Influence of Injection Molding Parameters on Mechanical Properties of Low Density Polyethylene Filled With Multiwalled Carbon Nanotubes

2011 ◽  
Author(s):  
Catalin Fetecau ◽  
Felicia Stan ◽  
Daniel Dobrea ◽  
Dan Catalin Birsan
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Injection Molding ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Flow Direction ◽  
Mold Temperature ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Melt Temperature

In this paper, we investigated the effect of injection molding parameters such as melt temperature, mold temperature, injection speed and holding pressure on the mechanical properties of low density polyethylene reinforced with 2.5 wt% multi-walled carbon nanotubes. The Taguchi methodology with four factors and two levels was used for the design of the injection molding experiments. The mechanical properties were evaluated by tensile tests in the flow direction at room temperature (23 °C) at crosshead speeds of 1 and 5 mm/min. It was found that the mechanical properties can be modified by manipulating the injection molding parameters. The Young’s modulus of the LDPE-MWNTs composite decreased as the melt temperature increased, while mold temperature, injection molding speed and holding pressure have a moderate influence on the Young’s modulus.

scholarly journals Effect of Heat Drawing Process on Mechanical Properties of Dry-Jet Wet Spun Fiber of Linear Low Density Polyethylene/Carbon Nanotube Composites

2017 ◽  
Vol 2017 ◽  
pp. 1-9
Author(s):  
Jong Won Kim ◽  
Joon Seok Lee
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Tensile Strength ◽  
Polymer Materials ◽  
Degree Of Crystallinity ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Drawing Process ◽  
Linear Low Density Polyethylene ◽  
Crystallinity Degree

Polyethylene is one of the most commonly used polymer materials. Even though linear low density polyethylene (LLDPE) has better mechanical properties than other kinds of polyethylene, it is not used as a textile material because of its plastic behavior that is easy to break at the die during melt spinning. In this study, LLDPE fibers were successfully produced with a new approach using a dry-jet wet spinning and a heat drawing process. The fibers were filled with carbon nanotubes (CNTs) to improve the strength and reduce plastic deformation. The crystallinity, degree of orientation, mechanical properties (strength to yield, strength to break, elongation at break, and initial modulus), electrical conductivity, and thermal properties of LLDPE fibers were studied. The results show that the addition of CNTs improved the tensile strength and the degree of crystallinity. The heat drawing process resulted in a significant increase in the tensile strength and the orientation of the CNTs and polymer chains. In addition, this study demonstrates that the heat drawing process effectively decreases the plastic deformation of LLDPE.

scholarly journals Extrusion Dwell Time and Its Effect on the Mechanical and Thermal Properties of Pitch/LLDPE Blend Fibres

Crystals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1520
Author(s):  
Salem Mohammed Aldosari ◽  
Sameer Rahatekar
Keyword(s):  
Tensile Strength ◽  
Dwell Time ◽  
Low Density Polyethylene ◽  
Mechanical And Thermal Properties ◽  
Low Density ◽  
Carbon Fibres ◽  
Linear Low Density Polyethylene ◽  
New Generation ◽  
Thermal Stability Of ◽  
Selection Of

Mesophase pitch-based carbon fibres have excellent resistance to plastic deformation (up to 840 GPa); however, they have very low strain to failure (0.3) and are considered brittle. Hence, the development of pitch fibre precursors able to be plastically deformed without fracture is important. We have previously, successfully developed pitch-based precursor fibres with high ductility (low brittleness) by blending pitch and linear low-density polyethylene. Here, we extend our research to study how the extrusion dwell time (0, 6, 8, and 10 min) affects the physical properties (microstructure) of blend fibres. Scanning electron microscopy of the microstructure showed that by increasing the extrusion dwell from 0 to 10 min the pitch and polyethylene components were more uniformly dispersed. The tensile strength, modulus of elasticity, and strain at failure for the extruded fibres for different dwell times were measured. Increased dwell time resulted in an increase in strain to failure but reduced the ultimate tensile strength. Thermogravimetric analysis was used to investigate if increased dwell time improved the thermal stability of the samples. This study presents a useful guide to help with the selection of mixes of linear low-density polyethylene/pitch blend, with an appropriate extrusion dwell time to help develop a new generation of potential precursors for pitch-based carbon fibres.

Tensile Properties LLDPE/Soya Spent Powder Blends: Oven Aging

2013 ◽  
Vol 795 ◽  
pp. 429-432
Author(s):  
S.T. Sam ◽  
N.Z. Noriman ◽  
S. Ragunathan ◽  
H. Ismail
Keyword(s):  
Tensile Strength ◽  
Tensile Properties ◽  
Aging Time ◽  
Thermal Aging ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Linear Low Density Polyethylene ◽  
Elongation At Break ◽  
Powder Blends ◽  
Internal Mixer

Linear low-density polyethylene (LLDPE)/soya spent powder blends with different blends ratio were prepared by using internal mixer. Soya spent powder was varied from 5 to 40 wt. The thermal degradability was assessed by subjecting the dumbbell sample to oven aging. Thermal aging was carried out for 5 weeks. The degradability was measured by the periodic change in tensile properties of the blend samples. The tensile strength and elongation at break of the blends reduced as increasing the aging time. The effect of degradation was obvious in higher soya spent powder blends.

Sign in / Sign up

Export Citation Format

Share Document